From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9985AC433DF for ; Tue, 13 Oct 2020 15:56:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A47025220 for ; Tue, 13 Oct 2020 15:56:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731366AbgJMP4L (ORCPT ); Tue, 13 Oct 2020 11:56:11 -0400 Received: from out20-61.mail.aliyun.com ([115.124.20.61]:52938 "EHLO out20-61.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727016AbgJMP4K (ORCPT ); Tue, 13 Oct 2020 11:56:10 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.09496473|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_social|0.00616385-0.00140248-0.992434;FP=0|0|0|0|0|-1|-1|-1;HT=ay29a033018047207;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=2;RT=2;SR=0;TI=SMTPD_---.IiizUKW_1602604567; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.IiizUKW_1602604567) by smtp.aliyun-inc.com(10.147.40.200); Tue, 13 Oct 2020 23:56:08 +0800 Date: Tue, 13 Oct 2020 23:56:11 +0800 From: Wang Yugui To: linux-xfs@vger.kernel.org Subject: dbench throughput(sync, reflink=0|1) on xfs over hardware throughput Cc: wangyugui@e16-tech.com Message-Id: <20201013235609.EFC0.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.75.01 [en] Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Hi, #any reply, please Cc: wangyugui@e16-tech.com dbench throughput(sync, reflink=0|1) on xfs over hardware throughput(6Gb/s=750MB/s). Is this a bug of xfs sync? or some feature of performance optimization? we test mkfs.xfs -m reflink=0|1, crc=0|1, still over hardware throughput(6Gb/s=750MB/s). Disk: TOSHIBA PX05SMQ040 This is a 12Gb/s SAS SSD disk, but connect to 6Gb/s SAS HBA, so it works with 6Gb/s. dbench -s -t 60 -D /xfs 32 #Throughput 884.406 MB/sec (sync open) dbench -s -t 60 -D /xfs 1 #Throughput 149.172 MB/sec (sync open) we test the same disk with ext4 filesystem, the throughput is very close to, but less than the hardware limit. dbench -s -t 60 -D /ext4 32 #Throughput 740.95 MB/sec (sync open) dbench -s -t 60 -D /ext4 1 #Throughput 124.67 MB/sec (sync open) linux kernel: 5.4.70, 5.9.0 Best Regards Wang Yugui (wangyugui@e16-tech.com) 2020/10/13